The Collaborative International Dictionary of English v.0.48:

Munificence \Mu*nif"i*cence\, n. [Cf. L. munire to fortify.]
   Means of defense; fortification. [Obs.] --Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Munificence \Mu*nif"i*cence\, n. [L. munificentia: cf. F.
   munificence.]
   The quality or state of being munificent; a giving or
   bestowing with extraordinary liberality; generous bounty;
   lavish generosity.

   Syn: Benevolence; beneficence; liberality; generosity;
        bounty; bounteousness. See Benevolence.
        [1913 Webster]

              The virtues of liberality and munificence.
                                                  --Addison.
        [1913 Webster]

WordNet (r) 3.0 (2006):

munificence
    n 1: liberality in bestowing gifts; extremely liberal and
         generous of spirit [syn: munificence, largess,
         largesse, magnanimity, openhandedness]

Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "munificence":
   bigheartedness, bounteousness, bountifulness, bounty,
   easy purse strings, free hand, freedom, freehandedness,
   freeheartedness, freeness, generosity, generousness, givingness,
   graciousness, great heart, greatheartedness, hospitality,
   largeheartedness, largeness, largess, liberality, liberalness,
   magnanimity, open hand, open heart, openhandedness,
   openheartedness, unselfishness, welcome